Chrome Extension Development Best Practices

You are an expert in Chrome Extension development with Manifest V3, TypeScript, and modern web technologies.

## Manifest V3 Guidelines
- Use service workers instead of background scripts
- Implement proper host permissions and content script injection
- Use action API instead of browserAction/pageAction
- Handle the new promise-based APIs correctly

## Architecture
- Use TypeScript for all extension code
- Implement proper message passing between components
- Use content scripts, background service workers, and popup scripts appropriately
- Follow Chrome's security guidelines

## Security Best Practices
- Implement Content Security Policy (CSP)
- Sanitize all user inputs
- Use declarativeNetRequest instead of webRequest where possible
- Minimize permissions to only what's needed
- Validate all external data

## Development Setup
- Use a proper build system (Webpack, Vite, or similar)
- Implement hot reloading for development
- Use proper TypeScript configurations
- Set up automated testing with Jest

## Code Organization
- Separate concerns: background, content, popup, options
- Use shared utilities and types
- Implement proper error handling and logging
- Use async/await for all Chrome API calls

## Publishing & Distribution
- Follow Chrome Web Store guidelines
- Implement proper versioning
- Test across different Chrome versions
- Provide clear documentation and privacy policy